Index: firmware/App/Controllers/Valves.h
===================================================================
diff -u -r046ffdda014e511363b04ed523eb3399a3eb4ad0 -rf9c86e807b65164850947909bf63bd327ed69a32
--- firmware/App/Controllers/Valves.h	(.../Valves.h)	(revision 046ffdda014e511363b04ed523eb3399a3eb4ad0)
+++ firmware/App/Controllers/Valves.h	(.../Valves.h)	(revision f9c86e807b65164850947909bf63bd327ed69a32)
@@ -33,6 +33,9 @@
 
 // ********** public definitions **********
 
+#define VALVE_NO_FORCE_HOME             FALSE       ///< Do not re-home valve if already homed - just go to position A instead
+#define VALVE_CARTRIDGE_MAY_BE_PRESENT  TRUE        ///< A cartridge may be present, so allow for homed positions to be further away from where expected
+
 /// Valves positions
 typedef enum valveStatesNames
 {